# -*- coding: utf-8 -*-

# Define here the models for your spider middleware
#
# See documentation in:
# https://doc.scrapy.org/en/latest/topics/spider-middleware.html

from scrapy import signals
import time
import random
import re
from selenium.webdriver import ActionChains
import sqlite3
from selenium import webdriver
from scrapy.http import HtmlResponse


class ComicscrapySpiderMiddleware(object):
    # Not all methods need to be defined. If a method is not defined,
    # scrapy acts as if the spider middleware does not modify the
    # passed objects.

    @classmethod
    def from_crawler(cls, crawler):
        # This method is used by Scrapy to create your spiders.
        s = cls()
        crawler.signals.connect(s.spider_opened, signal=signals.spider_opened)
        return s

    def process_spider_input(self, response, spider):
        # Called for each response that goes through the spider
        # middleware and into the spider.

        # Should return None or raise an exception.
        return None

    def process_spider_output(self, response, result, spider):
        # Called with the results returned from the Spider, after
        # it has processed the response.

        # Must return an iterable of Request, dict or Item objects.
        for i in result:
            yield i

    def process_spider_exception(self, response, exception, spider):
        # Called when a spider or process_spider_input() method
        # (from other spider middleware) raises an exception.

        # Should return either None or an iterable of Response, dict
        # or Item objects.
        pass

    def process_start_requests(self, start_requests, spider):
        # Called with the start requests of the spider, and works
        # similarly to the process_spider_output() method, except
        # that it doesn’t have a response associated.

        # Must return only requests (not items).
        for r in start_requests:
            yield r

    def spider_opened(self, spider):
        spider.logger.info('Spider opened: %s' % spider.name)


class ComicscrapyDownloaderMiddleware(object):
    # Not all methods need to be defined. If a method is not defined,
    # scrapy acts as if the downloader middleware does not modify the
    # passed objects.

    @classmethod
    def from_crawler(cls, crawler):
        # This method is used by Scrapy to create your spiders.
        s = cls()
        crawler.signals.connect(s.spider_opened, signal=signals.spider_opened)
        return s

    def process_request(self, request, spider):
        # Called for each request that goes through the downloader
        # middleware.

        # Must either:
        # - return None: continue processing this request
        # - or return a Response object
        # - or return a Request object
        # - or raise IgnoreRequest: process_exception() methods of
        #   installed downloader middleware will be called
        return None

    def process_response(self, request, response, spider):
        # Called with the response returned from the downloader.

        # Must either;
        # - return a Response object
        # - return a Request object
        # - or raise IgnoreRequest
        return response

    def process_exception(self, request, exception, spider):
        # Called when a download handler or a process_request()
        # (from other downloader middleware) raises an exception.

        # Must either:
        # - return None: continue processing this exception
        # - return a Response object: stops process_exception() chain
        # - return a Request object: stops process_exception() chain
        pass

    def spider_opened(self, spider):
        spider.logger.info('Spider opened: %s' % spider.name)

# class SeleniumMiddleware:
#     # def __init__(self):
#     #     self.browser = webdriver.Chrome()
#     #     super(SeleniumMiddleware,self).__init__()
#
#     def process_request(self, request, spider):
#         if (re.match('^https://manhua.163.com/reader/\d*', request.url)):
#             self.browser = webdriver.Chrome()
#             self.browser.get('https://manhua.163.com/reader/4316808070150070932/4316808070150075504')
#             # time.sleep(2)
#             # print('访问{}'.format(request.url))
#             return self.browser
#             # return HtmlResponse(url=browser.current_url, body=browser.page_source, encoding='utf-8', request=request)



            # 移动到网页下方
            # for i in range(25):
            #     browser.execute_script("window.scrollBy(0,2500)")
            #     time.sleep(1)
            #
            # pattern = re.compile(r'url: window.IS_SUPPORT_WEBP [?](.*)')
            # imgUrls = pattern.findall(browser.page_source)
            # l = []
            # for each in imgUrls:
            #     imgUrl = each.replace('\"', '').rstrip(',').strip()
            #     imgUrl = imgUrl.split(' : ')
            #     pattern = re.compile(r'NOSAccessKeyId=(.*)')
            #     imgUrl = [re.sub(pattern, 'NOSAccessKeyId=c92f74b0d48f4fb39271a1109da74cc2', a).replace(' ', '') for a
            #               in
            #               imgUrl]
            #     imgUrl = imgUrl[0].replace('amp;','').rstrip(',').strip()
            #     print(imgUrl)
            #     l.append(imgUrl)
            #     print(l)
            #     content = dict()
            #     content[request.url] = l
            #     print(content)
                # return response
        # return HtmlResponse(url=browser.current_url, body=browser.page_source, encoding='utf-8', request=request)
